Problems finding gd.pm in perl 5.8.6 using linux

All:
I have installed the proper GD library and GD.pm for Perl/CGI and
still
am coming up with problems. I get the following error messages when I

type in "perl shapes.pl | display -" in the GD/demos directory. The
funny thing is, even though I get these compilation errors, the shapes

program still runs. Any ideas about how to stop said errors?

Can't locate GD/Image.pm in @INC
Can't locate loadable object for module GD in @INC